Sholom Dovber Schneersohn (Hebrew: ???? ????? ??????????) was the fifth Rebbe (spiritual leader) of the Chabad Lubavitch chasidic movement.
He is known as "the Rebbe Rashab" (for Reb Sholom Ber).
His teachings represent the emergence of an emphasis on outreach that later Chabad Rebbes developed into a major theme.